Cot this from the web. Credit to the writer.
June 18 at 2:20pm
few people where asking how to change the bar on the menu...
things you will need...
Photoshop and KodiXBMCTextureTool (link below)
MAKE SURE YOU BACKUP!!
MAKE SURE ALL HIDDEN FILES ARE VISIBLE!
Open the app...
Press "select your input file"
Now head to : C:\Users\INPUT COMPUTER NAME\AppData\Roaming\Kodi\addons\skin.aeon.nox.5\media
Press the textures.xbt (if possible select another one as these are the themes...)
Select an output folder (desktop and a folder called kodi will be fine)
...the skin will now extract to there...
File-Open and head to the folder you extracted the skin...
Select "homemenu_back" and open
and save as a .PNG and overwrite the old one CHECK BEFORE DOING NEXT STEP! THE OLD "homemenu_back" MUST NOT BE THERE YOUR NEW ONE MUST REPLACE IT!!
Head back to the "KodiXBMCTextureTool"
This time your input folder is the one you just edited and your output is the one you extracted from (the opposite to taking the skin apart)
you can overwrite the skin theme you extracted or make a new one by changing the name you save as...
Now press "Start"
once done open kodi
head to SYSTEM-APPEARANCE-SKIN-THEME and scroll to the one you made
hay presto new bar...
*NOTE this is based off the Aeon Nox skin not tested others yet also feel free to edit other bits and see how it turns out like*